我刚刚开始在 ubuntu 上使用核心 php 和 laravel 框架进行 web 开发。我已经安装了 php 和所有依赖项，但是mysql 不能单独工作，但它在 lampp 内部工作
所以我开始给出以下命令
mysql -u 根 -p
我得到了以下响应（仅运行“mysql”和“sudo mysql”相同）
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
另外，当我进入 /var/run 时，没有名为 mysqld 的文件夹
cd /var/run/mysqld
bash: cd: /var/run/mysqld: No such file or directory
也看看这个
cd /var/run
aq@DevilsBook:/var/run$ ls
acpid.pid console-setup dhclient-wlo1.pid initctl mount rsyslogd.pid sudo user
acpid.socket crond.pid dmeventd-client initramfs network sendsigs.omit.d systemd utmp
alsa crond.reboot dmeventd-server lock NetworkManager shm thermald uuidd
apache2 cryptsetup fsck log php snapd-snap.socket tmpfiles.d wpa_supplicant
avahi-daemon cups gdm3 lvm plymouth snapd.socket udev
blkid dbus gdm3.pid lvmetad.pid pppconfig spice-vdagentd udisks2
除此之外，/var/lib 中还有一个名为 mysql 和 mysql-upgrade 的文件夹。
然后我尝试了服务 mysql 启动命令，花费了很多时间
sudo service mysql status
[sudo] password for aq:
● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; bad; vendor preset: enable
Active: inactive (dead)
[1]+ Stopped sudo service mysql status
并运行相同的命令，但没有 sudo我得到了
Job for mysql.service failed because the control process exited with error code.
See "systemctl status mysql.service" and "journalctl -xe" for details.
之后我明白了systemctl 状态 mysql.service结果是
● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; bad; vendor preset: enable
Active: failed (Result: exit-code) since Tue 2019-01-15 01:04:13 PKT; 28s ago
Process: 3359 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exit
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Service hold-off time ov
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Scheduled restart job, r
جنوری 15 01:04:13 DevilsBook systemd[1]: Stopped MySQL Community Server.
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Start request repeated t
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Failed with result 'exit
جنوری 15 01:04:13 DevilsBook systemd[1]: Failed to start MySQL Community Server.
lines 1-11/11 (END)...skipping...
● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; bad; vendor preset: enabled)
Active: failed (Result: exit-code) since Tue 2019-01-15 01:04:13 PKT; 28s ago
Process: 3359 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=1/FAILURE)
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Service hold-off time over, scheduling restart.
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Scheduled restart job, restart counter is at 5.
جنوری 15 01:04:13 DevilsBook systemd[1]: Stopped MySQL Community Server.
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Start request repeated too quickly.
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Failed with result 'exit-code'.
جنوری 15 01:04:13 DevilsBook systemd[1]: Failed to start MySQL Community Server.
~
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~
[2]+ Stopped systemctl status mysql.service
最后我跑了journalctl-xe
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Scheduled restart job, restart counter is at 5.
-- Subject: Automatic restarting of a unit has been scheduled
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Automatic restarting of the unit mysql.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
جنوری 15 01:04:13 DevilsBook systemd[1]: Stopped MySQL Community Server.
-- Subject: Unit mysql.service has finished shutting down
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit mysql.service has finished shutting down.
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Start request repeated too quickly.
جنوری 15 01:04:13 DevilsBook systemd[1]: mysql.service: Failed with result 'exit-code'.
جنوری 15 01:04:13 DevilsBook systemd[1]: Failed to start MySQL Community Server.
-- Subject: Unit mysql.service has failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit mysql.service has failed.
--
-- The result is RESULT.
جنوری 15 01:05:29 DevilsBook systemd[1]: Starting Cleanup of Temporary Directories...
-- Subject: Unit systemd-tmpfiles-clean.service has begun start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit systemd-tmpfiles-clean.service has begun starting up.
جنوری 15 01:05:30 DevilsBook systemd[1]: Started Cleanup of Temporary Directories.
-- Subject: Unit systemd-tmpfiles-clean.service has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit systemd-tmpfiles-clean.service has finished starting up.
--
-- The start-up result is RESULT.
尽管 mysql 在 lamp 中工作，但可以看到 lampp 运行的结果sudo /opt/lampp/lampp 启动
aq@DevilsBook:~$ sudo /opt/lampp/lampp start
[sudo] password for aq:
Starting XAMPP for Linux 7.2.13-0...
XAMPP: Starting Apache...fail.
XAMPP: Another web server is already running.
XAMPP: Starting MySQL...ok.
XAMPP: Starting ProFTPD...ok.
我如何找到文件夹和包来消除这个问题？
答案1
答案来自 ->>https://www.youtube.com/watch?v=qr-t8ksYO78
转到 my.cnf 文件，请注意，您将找到多个 my.cnf 文件，我必须查看所有文件才能找到这个->
# The MySQL server
[mysqld]
user = mysql
port=3306
socket = /opt/lampp/var/mysql/mysql.sock
复制路径并像这样写入 ->
mysql -u root -p --socket=/opt/lampp/var/mysql/mysql.sock
谢谢